Table 3.

Univariate and Multivariate Analyses of 90-Day Complication Rates Between Matched Cohort of Inpatient vs. Outpatient Laminotomies for Lumbar Disc Herniation Controlled by Age, Sex, comorbidities, Insurance Type, and Geographic Region

90-day complication	Univariate			Multivariate (Reference group—outpatient)
	inpatient %	Outpatient %	p-value	Inpatient odds ratio	95% CI	p-value
Surgical site infection (SSI)	2.26%	1.42%	<.001	1.61	1.38–1.88	<.001
Sepsis	0.33%	0.29%	.50	1.15	0.80–1.65	.46
Nerve injury	0.02%	0.03%	.39	0.52	0.13–2.08	.35
Venous thromboembolism (VTE)	1.84%	0.94%	<.001	1.96	1.62–2.36	<.001
Wound dehiscence	0.83%	0.58%	.005	1.42	1.11–1.82	.005
Hematoma	1.25%	0.74%	<.001	1.71	1.38–2.11	<.001
Urinary tract infection (UTI)	3.66%	2.63%	<.001	1.41	1.25–1.58	<.001
Acute kidney injury (AKI)	0.50%	0.28%	<.001	1.75	1.25–2.45	.001
Atrial fibrillation	0.97%	0.77%	.03	1.25	0.96–1.64	.10
Dural tear	0.79%	0.51%	<.001	1.55	1.20–2.01	<.001
Neurogenic urinary retention	2.26%	1.20%	<.001	1.89	1.61–2.22	<.001
Revision surgery	1.97%	2.95%	<.001	0.67	0.58–0.76	<.001
Hospital readmission	7.60%	4.28%	<.001	1.84	1.68–2.01	<.001

CI=confidence interval

Statistical significance when p-value <.05/13 based on Bonferroni correction.